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Diff for /loncom/homework/lonmaxima.pm between versions 1.5 and 1.27

version 1.5, 2006/06/13 14:57:54 version 1.27, 2008/09/25 10:23:56
Line 31  package Apache::lonmaxima; Line 31  package Apache::lonmaxima;
 use strict;  use strict;
 use IO::Socket;  use IO::Socket;
 use Apache::lonnet;  use Apache::lonnet;
   use Apache::response();
 use LONCAPA;  use LONCAPA;
   
 sub connect {  sub connect {
Line 59  sub maximareply { Line 60  sub maximareply {
   
 sub blacklisted {  sub blacklisted {
     my ($cmd)=@_;      my ($cmd)=@_;
     foreach my $forbidden ('save','load','plot','lisp','includ','compil','file','batch','stringout','translat','stout','stin','block','system') {      foreach my $forbidden (
           '\? ','\?','%i\d','%o','batch','block'
          ,'compil','concat','describe','display2d','file','inchar'
          ,'includ','lisp','load','outchar','plot','quit'
          ,'read','reset','save','stin','stout','stringout'
          ,'system','translat','ttyoff','with_stdout','writefile'
        ) {
  if ($cmd=~/$forbidden/s) { return 1; }   if ($cmd=~/$forbidden/s) { return 1; }
     }       } 
     return 0;      return 0;
 }  }
   
   sub maxima_allowed_libraries {
      return (
         "absimp","affine","atensor","atrig1","augmented_lagrangian","contrib_ode","ctensor","descriptive","diag",
         "eigen","facexp","fft","fourie","functs","ggf","grobner","impdiff","ineq","interpol","itensor","lapack",
         "lbfgs","lindstedt","linearalgebra","lsquares","makeOrders","mnewton","mchrpl","ntrig","orthopoly",
         "quadpack","rducon","romberg","scifac","simplex","solve_rec","sqdnst","stats","sterling","sym","units",
         "vect","zeilberger");
   }
   
   sub maxima_is_allowed_library {
       my ($library)=@_;
       foreach my $allowed_library (&maxima_allowed_libraries()) {
          if ($library eq $allowed_library) { return 1; }
       }
       return 0;
   }
   
   sub runscript {
       my ($socket,$fullscript,$libraries)=@_;
       if (&blacklisted($fullscript)) { return 'Error: blacklisted'; }
       my $reply;
       $fullscript=~s/[\n\r\l]//gs;
       if ($libraries) {
          foreach my $library (split(/\s*\,\s*/,$libraries)) {
             unless ($library=~/\w/) { next; }
             if (&maxima_is_allowed_library($library)) {
                 $reply=&maximareply($socket,'load('.$library.')$'."\n");
                 if ($reply=~/^Error\:/) { return $reply; }
             } else { 
                return 'Error: blacklisted'; 
             }
          }
       }
       foreach my $line (split(/\;/s,$fullscript)) {
    if ($line=~/\w/) { $reply=&maximareply($socket,$line.";\n"); }
    if ($reply=~/^Error\:/) { return $reply; }
       }
       $reply=~s/^\s*//gs;
       $reply=~s/\s*$//gs;
       &Apache::lonxml::debug("maxima $fullscript \n reply $reply");
       return $reply;
   }
   
   sub maxima_cas_formula_fix {
      my ($expression)=@_;
      return &Apache::response::implicit_multiplication($expression);
   }
   
   sub maxima_run {
       my ($script,$submission,$argument,$libraries) = @_;
       my $socket=&connect();
       my @submissionarray=split(/\s*\,\s*/,$submission);
       for (my $i=0;$i<=$#submissionarray;$i++) {
           my $n=$i+1;
           my $fixedsubmission=&maxima_cas_formula_fix($submissionarray[$i]);
           $script=~s/RESPONSE\[$n\]/$fixedsubmission/gs;
       }
       my @argumentarray=@{$argument};
       for (my $i=0;$i<=$#argumentarray;$i++) {
           my $n=$i+1;
           my $fixedargument=&maxima_cas_formula_fix($argumentarray[$i]);
           $script=~s/LONCAPALIST\[$n\]/$fixedargument/gs;
       }
       my $reply=&runscript($socket,$script,$libraries);
       &disconnect($socket);
       if ($reply=~/^\s*true\s*$/i) { return 'EXACT_ANS'; }
       if ($reply=~/^\s*false\s*$/i) { return 'INCORRECT'; } 
       return 'BAD_FORMULA';
   }
   
   sub maxima_eval {
       my ($script,$libraries) = @_;
       my $socket=&connect();
       my $reply=&runscript($socket,$script,$libraries);
       &disconnect($socket);
       return $reply;
   }
   
   
 sub compareterms {  sub compareterms {
     my ($socket,$terma,$termb)=@_;      my ($socket,$terma,$termb)=@_;
     my $difference=$terma.'-'.$termb;      my $difference=$terma.'-('.$termb.')';
     if (&blacklisted($difference)) { return 'Error: blacklisted'; }      if (&blacklisted($difference)) { return 'Error: blacklisted'; }
     my $reply=&maximareply($socket,'trigsimp(trigreduce('.$difference.'));');      my $reply=&maximareply($socket,'trigsimp(trigreduce('.$difference.'));');
     if ($reply=~/^\s*0\s*$/) { return 'true'; }      if ($reply=~/^\s*0\s*$/) { return 'true'; }
Line 80  sub maxima_check { Line 166  sub maxima_check {
     my $socket=&connect();      my $socket=&connect();
     my $reply=&compareterms($socket,$response,$answer);      my $reply=&compareterms($socket,$response,$answer);
     &disconnect($socket);      &disconnect($socket);
       # integer to string mappings come from capaParser.h
       # 1 maps to 'EXACT_ANS'
     if ($reply eq 'true') { return 1; }      if ($reply eq 'true') { return 1; }
       # 11 maps to 'BAD_FORMULA'
       if ($reply=~/^Error\:/) { return 11; }
       # 7 maps to 'INCORRECT'
     return 7;      return 7;
 }  }
     
Removed from v.1.5  
changed lines
  Added in v.1.27

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